Related Experiment Videos
Experimental study on the comparative thrombolytic effects of intracoronary and intravenous administration of
Insights
Intracoronary urokinase (UK) effectively achieved coronary thrombolysis in 77% of cases. Intravenous UK showed variable success rates depending on dosage, with higher doses yielding better results.
Area of Science:
- Cardiovascular Research
- Pharmacology
- Experimental Medicine
Background:
- Coronary thrombolysis is crucial for treating myocardial infarction.
- Assessing the efficacy of different administration routes for thrombolytic agents is essential.
Purpose of the Study:
- To evaluate the effectiveness of intracoronary (i.c.) and intravenous/intraventricular (i.v./i.vt.) urokinase (UK) for coronary thrombolysis.
- To compare the success rates of UK administration via different routes in a canine model.
Main Methods:
- A canine model was used to induce coronary thrombus via electrical stimulation.
- Urokinase (UK) was administered via intracoronary, intravenous, or intraventricular routes at varying dosages.
- Coronary thrombolysis success rates and fibrinogen levels were measured.
Main Results:
- Intracoronary UK administration (4,000 U/Kg) achieved a 77% success rate in coronary thrombolysis.
- Low-dose intravenous/intraventricular UK (<24,000 U/Kg) had a 25% success rate.
- High-dose intravenous UK (>25,000 U/Kg) resulted in a 64% success rate and significant fibrinogen reduction.
Conclusions:
- Intracoronary administration of urokinase is a highly effective method for coronary thrombolysis.
- Higher doses of intravenous urokinase demonstrate significant thrombolytic efficacy, accompanied by reduced fibrinogen levels.
Abstract:
The effects of intracoronary (i.c.) and intravenous (i.v.) or intraventricular (i.vt.) urokinase (UK) administration were studied in a canine experimental model in which a coronary thrombus was produced by a modified electrical stimulation method. The success rate of coronary thrombolysis was 77% (17/22) with i.c. administration of 4,000 U/Kg of UK. Either i.v. or i.vt. UK administration of less than 24,000 U/Kg induced thrombolysis in 25% (2/8), while i.v. administration of more than 25,000 U/Kg resulted in a success rate of 64% (7/11) with a fibrinogen reduction from 313 +/- 63 mg/dl to 116 +/- 34 mg/dl.